It is generally believed that most of the matter in the universe is dark, i.e. cannot be detected from the light which it emits (or fails to emit)....

Cosmology deals with the nature of the universe. It can be broadly divided into three great ages. The first began in the 6th century BC with the Py...

Pulsars are stars, a significant part of whose observed energy output is not continuous but is emitted as distinct flashes or pulses of electromagn...

In 2015 author Robert Godwin revealed the story of William Leitch an almost unknown Scottish/Canadian scientist who in 1861 suggested that rockets ...